The unloading and loading effects generated during the excavation of foundation pits and the construction of new structures adjacent to high-rise buildings can significantly impact the stress and deformation of neighboring subway tunnel segments and stations.This paper takes the construction of a high-rise building adjacent to a rail transit station and tunnel segments in Chongqing as the research background.Through three-dimensional numerical simulation,the stress and deformation effects of different construction stages of the high-rise building on the adjacent underground structures are analyzed.The results show that:(1)The main factor causing deformation of the overall tunnel structure is the excavation of the foundation pit,followed by the loading effect of the newly constructed building;(2)The overall tunnel structure tends to deform towards the foundation pit side and float up during construction activities,followed by a gradual rebound deformation pattern as subsequent construction progresses.
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